"For security reasons, we temporarily suspend @DublinAirport operations because a secured drone was spotted over the airfield," the airport said via its official Twitter account, adding that passengers should contact their airlines for flight updates.
Less than an hour later, the airport said the operation had resumed and apologized for the inconvenience.
"Passenger safety is always our top priority," the airport said on Twitter.
This disruption is the latest in a series of drone sightings that have plagued airport operations around the globe.
And last month, flights to and from Newark Liberty International Airport in New Jersey and departures from London Heathrow Airport were temporarily suspended after drones were spotted.